JACK Replacement Digital TV Head, White - Replace your old Sensar antenna with the JACK replacement head for better digital TV reception. Includes custom bracket for simple retrofit to your existing antenna mast using the existing mounting pins. Broader reception range helps to receive signals found in the dead spot or 35deg. of rotation not reached by the existing mount. The amplified antenna can be powered by your existing antenna power supply or used with the included power injector. A universal mounting bracket is also included for installation on a pole or railing for residential use. At just 2.25in H x 16in W x 12.5in D, the JACK replacement head is 70 percent smaller with improved wind resistance and weighs 25 percent less than the existing antenna head. Sensar is a registered trademark of Winegard Company. JACK is a product of King Controls.